/*
 * Copyright (C) 2012 rothens
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package rpg.gfx;

import java.awt.Color;

/**
 *
 * @author rothens
 */
public class FadeEffect extends OverlayEffect {
    public boolean fadeIn;
    public int alpha;
    int chgValue = 0;
    
    public FadeEffect(int width, int height, boolean fadeIn, int chgValue){
        super(width, height, 0, 0);
        this.fadeIn = fadeIn;
        alpha = (fadeIn) ? 255 : 0;
        this.chgValue = chgValue;
    }

    @Override
    public boolean tick() {
        render();
        if(fadeIn){
            alpha-=chgValue;
            return alpha > 0;
        } else {
            alpha+=chgValue;
            return alpha < 256;
        }
        
    }
    
    public void render(){
        for(int i = 0; i < pixels.length; ++i){
            pixels[i] = ((alpha & 255) << 24);
        }
        
    }
    
}
